地壳的形成保护了地球的内层不受太空中高能粒子的影响，降低了地幔和地核的温度。
The formation of Earth's crust protected the inner layers of Earth from the high-energy particles in space, reducing the temperatures of the mantle and the core.
当这些带电粒子接近地球时，便形成一个很强的磁场区--磁气圈--包围着地球并对地球起一定的保护作用。
When the charged electrical particles approach the Earth, they carve out a highly magnetized region —the magnetosphere —which surrounds and protects the Earth.
预先过滤的主要作用是截获部分尺寸过大的粒子，并保护最终过滤不被过早的堵塞，以便提供过滤器最大的使用寿命。
The major role of pre-filtration is to capture a portion of the oversized particles and protect the final filtration from premature plugging in order to deliver maximum filter service life.
并采用细目碳酸钙及变形粒子对油层进行了保护。
In addition, fine calcium carbonate and a deformable particle were used to protect the reservoir.
我们被地球磁场和大气层保护免受这些粒子流的伤害。
We are protected from these particles by the Earth's magneticfield and atmosphere.
详细讨论了保护试剂的浓度对粒子尺寸和形貌的影响。
The effects of the concentration of protective agents on the particle size and morphology were discussed in detail.
本论文主要的目的是采用简单的方法制备新的烷基硫醇保护的纳米粒子。
In this dissertation, we have tried to find new methods to design and construct novel alkanethiolate –protected nanomaterials.
探讨了在空气中制备高分子保护的铜超微粒子分散液的方法和反应条件。
The paper studies the methods and reaction conditions for preparation of polymer-protected colloidal dispersions of ultrafine copper particles in the air.
正是由于地球磁场的保护，地球上居住着的生物才能幸免于来自太空中高能量粒子的袭击，否则这个星球就会变成一片不毛之地。
It is the magnetic field of the Earth that protects its inhabitants from being bombarded by high-energy particles from space that would otherwise leave the planet sterile.
这是一个复杂的过程，在充满微粒子的真空环境下对产品进行离子溅镀，以在产品表面形成保护层。
It is a sophisticated process, performed under vacuum which deposits microscopic particles on the products by ion bombing or sputtering, to form a protecting coating on their surface.
本发明要求保护制备由铝尖晶石构成的纳米粒子的方法。
The invention relates to a method for producing nanoparticles of aluminium spinels.
通过对两个算例的分析可看到改进算法的效果以及粒子群算法解决分布式电源并网情况下反时限过流保护整定问题的能力。
The improved PSO algorithm is tested in two models, to show the effects of improvement and its ability in solving the inverse time overcurrent relay coordination problem when DG units are connected.
通过对两个算例的分析可看到改进算法的效果以及粒子群算法解决分布式电源并网情况下反时限过流保护整定问题的能力。
The improved PSO algorithm is tested in two models, to show the effects of improvement and its ability in solving the inverse time overcurrent relay coordination problem when DG units are connected.
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